It is ironic that one of the most essential of statistical aggregations, the median, has been so difficult in the past to calculate efficiently in SQL. Dwain Camps sets the candidates to work and identifies the winners and losers.
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Many companies now have a requirement to keep data for long periods of time. While this data does have to be available if requested, it usually does not need to be accessible by the application for any current transactions. Data that falls into this category are a good candidate for archival.
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